give the guy a break, you were a newb once yourself. Yeah direct bolt in, simply because three of the mounts are on the transmission. No the auto motor shouldn't make a difference. Yeah you could go B16A but the first gen doesn't put out that much HP than the D16 w/ bolt ons and the torque numbers are very similar. Plus the d16 weighs about 75lbs less than the B series so it makes up some power there, but for free i say go for it, just make sure if you want to to change the timing belt and water pump while the motors out just to make it easier down the road. Here the lowdown:
B16A first gen swap= 1100 bucks, mount kit 300 bucks, and more labor time.
D16Y8 = free now you have the 1400 bucks you spent on the b16a to make it faster than the b16 would be any ways. Header/Intake/Exhaust 600 bucks, D series cam 250, vtec controller 200 bucks, throttle body 200 bucks, clutch kit 250 bucks. Right here you have spent less than the b16a , have a quick daily driver and can do the swap in less than a day. Have fun